Rennie is without Scotland internationals Stuart Hogg and Finn Russell, who both toured with the British and Irish Lions this summer. Fijian scrum-half Niko Matawalu, who has returned to Warriors, is not involved in the squad.

Centre Alex Dunbar makes his 100th Glasgow appearance.

“There are different people at Glasgow, there are different coaches at Connacht and with pre-season games you can’t really tell how they’re going to go,” said Warriors assistant coach Jonathan Humphreys.

“Ruaridh played really well against the Dragons [in last week’s 40-23 friendly win]. We were all really impressed with him. It’s great to have him back – he’s played over 100 times for the club and it’s as if he’s never been away.

“Reaching 100 caps will mean a lot to Alex Dunbar, he says it’s been a long time coming. It’s a special group, those 100-cap guys, so it’ll be a proud moment for him tomorrow night.”